/**
 *  echarts tooltip 自动轮播
 *  @author liuwei
 *  @param myChart  //初始化echarts的实例
 *  @param option   //指定图表的配置项和数据
 *  @param num      //类目数量(原因：循环时达到最大值后，使其从头开始循环)
 *  @param time     //轮播间隔时长
 */

var count = 0;
var timeTicket = null;
var echart = {};

export function autoHover(myChart, option, num, time) {
  var defaultData = {   //设置默认值
      time: 2000,
      num: 100
  };
  if(!time){
    time = defaultData.time;
  }
  if(!num){
    num = defaultData.num;
  }
  
  echart = myChart
  // var count = 0;
  // var timeTicket = null;

  timeTicket && clearInterval(timeTicket);
  timeTicket = setInterval(function () {
    myChart.dispatchAction({
      type: "downplay",
      seriesIndex: 0 //serieIndex的索引值   可以触发多个
    });
    myChart.dispatchAction({
      type: "highlight",
      seriesIndex: 0,
      dataIndex: count
    });
    myChart.dispatchAction({
      type: "showTip",
      seriesIndex: 0,
      dataIndex: count
    });
    count++;
    if (count >= num) {
      count = 0
    }
  }, time);
  myChart.on("mouseover", function (params) {
    clearInterval(timeTicket);
    myChart.dispatchAction({
      type: "downplay",
      seriesIndex: 0
    });
    myChart.dispatchAction({
      type: "highlight",
      seriesIndex: 0,
      dataIndex: params.dataIndex
    });
    myChart.dispatchAction({
      type: "showTip",
      seriesIndex: 0,
      dataIndex: params.dataIndex
    });
  });

  myChart.on("mouseout", function () {
    timeTicket && clearInterval(timeTicket);
    timeTicket = setInterval(function () {
      myChart.dispatchAction({
        type: "downplay",
        seriesIndex: 0 //serieIndex的索引值   可以触发多个
      });
      myChart.dispatchAction({
        type: "highlight",
        seriesIndex: 0,
        dataIndex: count
      });
      myChart.dispatchAction({
        type: "showTip",
        seriesIndex: 0,
        dataIndex: count
      });
      count++;
      if (count >= num) {
        count = 0
      }
    }, 3000);
  });
}

// 清除定时器
export function stopAuto() {
  if (timeTicket) {
    clearInterval(timeTicket);
    timeTicket = null;
  }

  echart.dispatchAction({
    type: "downplay",
    seriesIndex: 0
  });  
}
export default {
  autoHover,
  stopAuto
}